Answer:
What do you call a hen who counts her eggs?
Why do giraffes have long necks?
What's green and fuzzy and if it falls out of a tree on you, it will kill you?
What do you call a blender that made a mistake?
Some are clean and some are dirty, but all are meant to get a chuckle. Most like it, some takes offense from it.
I am a shimmering field that reaches far. Yet I have no tracks and am crossed without paths.